Quest log/map improvements

[lukep]

I think it would be good to have some way to link together the worldmap and the quest log, maybe:

- Right click on a quest to get your character to run towards the next location for the quest
- include a picture of the surrounding area (with the target marked) in the quest log
- mark quest locations in a special colour on the map
- create a "compass" type particle effect, so that you can home in on a target location (set by a quest)

This would help to prevent confusion in situations like when you get the staff for the first time, and don't know to go to the central building in Last Hope, or not being able to find Sunwall after going East (both of which I've seen and helped solve).